Purpose:To evaluate the value of 3D CT whole brain perfused volume(3D PBV)based on CT angiography(CTA)row data in hyperacute cerebral ***:35 patients with stroke in 3 hours performed no enhancement CT(NECT)and CTA sca...
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Purpose:To evaluate the value of 3D CT whole brain perfused volume(3D PBV)based on CT angiography(CTA)row data in hyperacute cerebral ***:35 patients with stroke in 3 hours performed no enhancement CT(NECT)and CTA scan.3D software Neuro PBV was utilizes to process the CTA row data and PBV of brain was *** examination was performed in 6 hours after CT *** ischemic lesion volume and quantity on 3D PBV and NECT were compared with ***:In 35 patients,the number of infarct lesion detected by MRI,PBV,NECT was 40,38,16 *** results of Kappa analysis between NECT and PBV with MR were-0.0128,*** result of Paired t-test for measurement of volume between PBV and MRI was t=7.249,P>*** lesions’which did not been detected by PBV volume were less than 4.5cm3Conclusion:3D PBV has the potential to assess the full extent of an ischemic stroke at an early stage,whereas PBV is limited to a relatively small ***3D PBV technique requires no additional x-ray exposure and contrast medium injection,and can be performed in a short period of time.
目的:分析女性乳腺密度构成与年龄、生理、生育特征因素的相关性,以及乳腺密度分型与乳腺癌风险潜在相关性。方法:选取2010年10月012年10月间来我院接受全数字乳腺X线摄影检查且临床资料完整的当地女性5006例。参考美国放射学院(American College of radiology,ACR)的乳腺影像报告及数据系统(breast imaging-report and data system,BI-RADS)分型标准,即脂肪型(腺体含量25%);散在腺体型(腺体含量25%-50%);不均匀致密型(腺体含量50%-75%);高度致型(腺体含量75%)。依据乳腺X线摄影结果评价乳腺腺体密度类型,乳腺癌以病理诊断为标准。按不同年龄、生理、生育特征因素分组,应用SPSS19.0软件对数据进行统计学分析。结果:5006例被调查对象乳腺密度构成:脂肪型、少量型、多量型、致密型依次为256(5.11%)、726(14.51%)、3719(74.29%)、305(6.09%)。平均年龄44.22±8.09岁,中位年龄43岁。乳腺密度与各年龄、哺乳史、流产史、绝经年龄、绝育手术组间差异有统计学意义(P<0.01)。乳腺密度与初潮年龄、初产年龄、是否服用雌激素对比组间差异无统计学意义(P>0.05)。病理证实乳腺癌184例,其乳腺密度构成:脂肪型、少量型、多量型、致密型依次为,26(14.13%)、66(35.87%)、91(49.46%)、1(0.54%)。其乳腺密度与各年龄、绝经年龄、否服用雌激素对比组间差异有统计学意义(P<0.01),与初潮年龄、初产年龄、哺乳史、流产史、绝育手术对比组间差异无统计学意义(P>0.05)结论:年龄、哺乳史、流产史、绝经年龄、是否做过绝育手术特征是影响女性乳腺密度的重要因素。年龄,特别是围绝经期前后较低乳腺密度类型女性乳腺癌风险更突出。
目的观察手枪弹击中防弹头盔致颅脑损伤的特点。方法将14只健康长白猪随机数字表法分为致伤组(9只)、对照组(5只)。致伤组使用9mm手枪弹、360m/s射速垂直射击防弹头盔板防护下的猪头部;对照组除使用相同弹药量无弹头手枪弹射击外,余同致伤组。观察伤后早期生命体征变化及伤后2h视网膜损伤情况,留取伤前、伤后3h脑脊液,用以检测脑损伤标志物神经元特异性烯醇化酶(neuron specific enolase,NSE)、αII-spectrin蛋白含量。随后处死动物并解剖,观察颅脑大体形态改变,取部分脑皮质固定、HE染色,观察其显微病理改变。结果致伤组伤后早期出现血压下降,心率和呼吸频率加快,视网膜出血(3/9),颅骨骨折(3/9),脑表面损伤(9/9),包括局部脑撞击伤(9/9)及对冲伤(9/9),撞击伤重于对冲伤,显微镜下见撞击部位及对冲部位大脑皮质神经元急性损伤,伤后3h脑脊液NSE、αII-spectrin蛋白含量较伤前显著升高(P<0.05)。结论手枪弹击中防弹头盔板防护下的猪头部早期可致钝性颅脑损伤,且撞击伤重于对冲伤。因此,作战人员防弹头盔后颅脑损伤应引起重视,并得到早期诊断和治疗。
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